擅长:python、mysql、java
<p>这是典型的反模式。您可以通过以下方法解决此问题:</p>
<ul>
<li>预取所有引用。有关详细信息,请参见<a href="http://blog.notdot.net/2010/01/ReferenceProperty-prefetching-in-App-Engine" rel="nofollow">Nick's blog entry</a>。在</li>
<li>使用ndb。此模块没有ReferenceProperty。它有各种各样的好东西,比如<a href="https://developers.google.com/appengine/docs/python/ndb/cache" rel="nofollow">2 automatic caching layers</a>,<a href="https://developers.google.com/appengine/docs/python/ndb/async" rel="nofollow">asynchronous mechanism called tasklets</a>,等等。在</li>
</ul>